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初中英语—数词
数词分为基数词和序数词两种。表示数目或数量多少的词叫基数词；表示数目顺序的词叫序数词。
一.基数词
1.基数词就注意以下几点：
（1）几十几的基数词的十位数与个位数之间要用连字符“-”连接。如：
eighty-five 85
twenty-six 26
（2）三位数的基数词须在百位和十位（若无十位则和个位）之间用and连接。如：three hundred and sixty-five 365
two hundred and six 206
（3）基数词的复数形式。当基数词等词前有具体数词或several修饰时，必须用单数。如：
several hundred years ago几百年前
two thousand students两千个学生
2.基数词的特殊用法：
（1）表示“几十年代”或“几十岁”
in the 1990’s 20世纪90年代
in one’s twenties在某人20多岁时
（2）用在习语中。如：
in twos and threes
二.序数词
1.前边的基数词不变。如：2.21st第32nd第3.thea或an时，则表示“又一；再一”（没有
那只小猴子已经吃了3
三.分数和百分数
1.分数
（1）分数的分子用基数词，分母用序数词。如：
one fifth五分之一
one tenth十分之一
（2）当分子大于1时，分母用序数词的复数。如：
two thirds三分之二
five eighths八分之五
（3）当分子是1时，可以用one也可以用a。如：
a second = one second
a third = one third
（4）当分母是2和4时，分别可以用half和quarter代替。如：
a half二分之一
three quarters四分之三
2.百分数
百分数用percent表示。如：
forty percent百分之四十
three percent百分之三
3.分数、百分数与主谓一致
分数、百分数的考查往往和主谓一致相联系。当分数、我们学校百分之八十的学生来自河南。
我们班四分之三的学生对英语感兴趣。
地球上三分之二的水是海水。
四.倍数的表示法
1.表示“几倍大小（长短；数量）”，由“倍数（）”
2.表示“……比……”++ than +被比较部分”结构组成。如：
3.表示是”+ as +被比较部分”结构组成。如：
练习※答案
()1.Lincoln was born on ________.A.February 12, 1809B.1809, February 12C.1809, 12 FebruaryD.February 1809,12
()2.A _______ boy can sing the English song very well.A.ten-year-oldB.ten years oldC.ten-year-oldD.fifth years old
()3.An hour later, _____ minister was sent to see the “magic cloth” woven by those two men.A.twoB.the secondC.the twoD.second
()4.Abraham Lincoln was _______ President of the United States.A.16B.the 16C.16thD.the 16th
()5.Do you think there is any room for us ________ ?
A.twoB.the twoC.secondD.the second
()6.How many students are there in your cla?
________.A.Twenty nineB.Thirty and two()7.Which number is wrong? _______.A.NinetyB.NinteenC.Ninth(A.on August 1, 1927()9.The number 4,123 is read _______.A.four thousand one hundred and B.thousand one hundred twenty-three
C.four a and thousands a hundred and twenty-three
(D.in the sixty
(D.as big three times as
((A.fifty twoD.the fifty-fourth car
(B.He is at the age of 15.(A.nine hundreds ofB.nine hundredC.nine hundredsD.nine hundred of
()16.How many new words are there in ________ leon?
There are only _________.A.five;fifthB.fifth;fiveC.the fifth;the fiveD.the fifth;five
()17.________, Coca-Cola began to enter China's market.A.In 1970'sB.In 1970sC.In the 1970s'D.In the 1970s
()18.There was no bus in that small town.We had a ________.A.ten miles walkB.ten-mile walkC.ten mile's walkD.tenth mile walk
()19.Today is the first day and ________.A.Tuesday is fourthB.Thursday is the fourthC.second is Tuesday D.a second is Thursday
()20.Which room do you live in? ________.A.The 201 RoomB.Room 201C.Room 201stD.The 201's Room
()21.How many magazines do you have? I have ________.A.twoB.bothC.twiceD.the second
()22.Three hundred thousand one hundred and seventy means ________.A.3,170B.3,117C.300,170D.30,170
()23.On May ________, ________ people traveled round the country.A.the first, millionsB.the first, millions ofC.first, the millionthD.first, millions
()24.________ of them are dining at school.A.TwelveB.TwelfthC.The twelveD.the 12th
()25.It's 7:17 is read ________.A.seven and seventeenB.seven seven()26.Four ________ two is two.A.plusB.minusC.times()27.Three ________ five is eight.A.plusB.minusC.times(A.plusB.minusC.times()29.Forty-two ________ seven is six.A.plus((((A.the ninethD.ninth
(A.thirdB.threeD.the three
(A.The twelveB.The twelvethC.The twelfethD.The twelfth
()36.We have known each other for ________.A.a year and halfB.a year with halfC.a year and a halfD.a year with a half
()37.“What year is it?”
“It's ________.”
A.nineteen hundred and ninety-sevenB.nineteen and ninety-seven
C.nineteen ninety and sevenD.nineteen ninety-seven
()38.“What's the date today?”
“It's _________.”
A.TuesdayB.June FourthC.June the fourD.June the fourth
()39.The train from Shanghai will arrive ________.A.in quarter past sixB.in a quarter past sixC.at quarter past sixD.at a quarter past six
()40.My friend was born on _________.A.three of July, 1979B.the third of July,1979
C.1979, July the thirdD.1979, the third of July
()41.________ is le than ________.A.One-third;two-thirdsB.One-third;two-third
C.First-three;first-threesD.One-third;one-three
()42.Which leon did you learn yesterday? ________.A.Leon SevenB.Leon seventhC.The 7 Leon()43.“What's the date today?” “It's _______.”
A.the fourth of mayB.the fourth May()44.334 is read ________.A.three hundreds and thirty fourC.three hundred and thirty fourth(A.twenty nineB.twenty-nineth(A.seven past thirtyB.half past seven(D.one and half hour
(((D.a two meter
Key:
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